Alexey Tochin focused on build system configuration for the simonmichael/stackage repository, addressing stability and compatibility issues related to dependency management. During the month, Alexey delivered a targeted fix by constraining the inf-backprop package to a compatible version of the isomorphism-class library, mitigating the risk of build failures with newer library releases. This work involved careful analysis of dependency relationships and validation of changes to ensure ongoing CI reliability. Using YAML for configuration, Alexey improved the project’s upgrade path and reduced integration risks. The depth of the work lay in its precise scope and its impact on long-term build stability.